In a functional siphon, water rushes from the reservoir to the siphon because ______ .

the pressure in siphon is higher than the atmospheric pressure

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the pressure in siphon is zero

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the pressure in siphon is lower than the atmospheric pressure

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the pressure in siphon becomes equal to the atmospheric pressure

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Solution

The correct option is C the pressure in siphon is lower than the atmospheric pressure
Siphon is a device/tube which allows a liquid to flow through it without any use of a pump. A low pressure is created by the suction effect of a part of liquid flowing under gravity and due to that, liquid rushes from the reservoir to the tube. A fluid always flows from high pressure to low pressure and it continues to do so unless equilibrium is established.

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